GTM -- Monitor different IP apart from pool member

We want to achive DR scenario in GTM for interdependant services with below scenario.

 

Scenario - Pool member is PROXY which can be added in monitoring with 443 port. But this PROXY is forwarding the requests to ADFS server, in this case if PROXY service is UP and ASFS service is down GTM will forward traffic to PROXY which is being monitor as it is pool menmber. Then PROXY will forward traffif to ADFS and request will fail as ADFS service is down.

 

Query- Is there any option available in GTM to monitor different IP along with pool member and write logic- if any one of them is down then consider the pool down.